Input File Injection fails on instances with an independent mesh

[xvheule]

The code assumes the mesh is defined on the part, in case it is defined on the instance, the element sets will still be injected on the part definition in the input file.
As a result, the input file processor will not recognize the element sets causing the job to fail.

Fix: make the input file injection more robust by detecting independent or dependent meshes and injecting at the correct location.